personal protective equipment Always wear safety goggles whenever you are working with chemicals, burners, or any substance that might get into your eyes. Protective gloves should be worn when working with corrosive chemicals. Laboratory aprons or coats should also be worn whenever working with chemicals or heated substances.

dress code Wear regular long sleeve blouses or shirts. Slacks give good protection for the legs. Shorts do not protect your legs and are not appropriate for lab work. Tie back long hair Any article of clothing or jewelry that can hang down Wear regular enclosed shoes. Sandals will not protect the feet and are not allowed.

general safety rules 7. Read all directions for an experiment several times. Listen alertly at the lab briefing. Ask questions if you do not understand any part of the experiment. Follow the directions exactly as they are written. 8. Never perform activities that are not authorized by your teacher. 9 Never handle any equipment unless you have specific permission. 10. Take extreme care not to spill any material in the laboratory If spills occur, ask your teacher immediately about the proper clean-up procedure. Never simply pour chemicals or other substances into the sink or trash container.

11. Never eat or drink in the laboratory 11. Never eat or drink in the laboratory. Wash your hands after working with any chemical. 12. There should be no loud talking or horseplay in the laboratory. 13. When performing a lab, make sure the work area has been cleared of purses, books, jackets, etc.

14. Know the location and use of all safety equipment (goggles, aprons, eyewash, fire blanket, fire extinguishers, etc.) 15. Read your assignment before coming to class and be aware of all safety precautions. Follow directions. 16. Never work alone in the lab.

First aid Report all accidents to your teacher immediately. Learn what to do in case of specific accidents, such as getting acid in your eyes or on your skin. Use the shower to rinse acids from your body, rinse for 15 minutes. Become aware of the location of the first aid kit. However, your teacher should administer any required first aid due to injury. Or your teacher may suggest sending you to the school nurse or calling a physician.

heating and fire safety 20. Again, never use any heat source such as a candle or burner without wearing safety goggles. 21. Always maintain a clean work area and keep all materials away from flames. Never leave a flame unattended. When the burner is not needed, shut it off. 22. Never reach across a flame. 23. Make sure you know how to light a Bunsen burner.

Always point a test tube that is being heated away from you and others Always point a test tube that is being heated away from you and others. Chemicals can splash or boil out of a heated test tube. Never heat a liquid in a closed container. The expanding gases produced may blow the container apart, injuring you or others. Never pick up any container that has been heated without first holding the back of your hand near it. If you can feel the heat on the back of your hand, the container may be too hot to handle. Always use a clamp or tongs when handling hot containers. Hot glassware looks the same as cool glassware.

using chemicals safely Never touch, taste, or smell any chemical. Always gently wave your hand over the opening of a container and direct the fumes toward your nose. Do not inhale the fumes directly from the container. Use only those chemicals needed in the activity. Keep all lids closed when a chemical is not being used. Notify your teacher when chemicals are spilled. Dispose of all chemicals as instructed by your teacher. Be extra careful when working with acids or bases. Pour such chemicals over the sink, not over your work bench.

Use a pipet bulb. Never pipet solutions using your mouth. When diluting an acid, always pour the acid into water. Never pour water into the acid. Rinse any acids off your skin with cool, running water. Have the student next to you immediately notify your teacher of the acid spill Same procedure for bases Use a pipet bulb. Never pipet solutions using your mouth. Be sure you use the correct chemical. Read the label twice. A W

Do not return excess chemicals back to the reagent bottle and do not contaminate the supply. Keep combustible materials away from open flames (alcohol, carbon disulfide, and acetone are combustible). Do not use the same spatula to remove chemicals from two different containers. Each container should have a different spatula.

using glassware safely Glass tubing should never be forced into a rubber stopper. A turning motion and lubricant will be helpful when inserting glass tubing into rubber stoppers or rubber tubing. When heating glassware, use a wire or ceramic screen to protect glassware from the flame of a Bunsen burner.

If you are instructed to cut glass tubing, always fire polish the ends immediately to remove sharp edges. Never use broken or chipped glassware. If glassware breaks, notify your teacher and dispose of the glassware in the proper trash container. Never eat or drink from laboratory glassware. Always thoroughly clean any glassware before putting it away. Broken Glass

using sharp instruments Handle scalpels or razor blades with extreme care. Never cut any material towards you: always cut away from you. Notify your teacher immediately if you are cut in the laboratory. Properly mount, dissecting specimens to the dissecting pan before making a cut

electrical equipment rules Never use such metal articles as metal rulers, metal pencils or pens, nor wear rings, metal watchbands, bracelets, etc. when doing electrical work. When disconnecting a piece of electrical equipment, pull the plug and not the wire. Turn off all power when setting up circuits or repairing electrical equipment.

Use caution in handling electrical equipment which has been in use and has been disconnected. The equipment may still be hot enough to produce a serious burn. Never connect, disconnect, or operate a piece of electrical equipment with wet hands or while standing on a wet floor.

end-of-experiment rules When an experiment is completed, always clean up your work area and return all equipment to its proper place. Wash your hands after every experiment. Make sure all candles and burners are turned off before leaving the laboratory. Check that the gas line leading to the burner is off as well.

Lab Safety Quiz 1. When diluting an acid, always pour a. water into the acid b. the acid into water c. the base into water 2. When inserting glass tubing into a rubber stopper, a. use a turning motion b. apply a lubricant c. both a and b

3. To protect glassware from the flame of a Bunsen burner, a. use a wire screen or ceramic gauze pad b. immerse the glassware in water c. hold the glassware over the flame 4. Always point a test tube that is being heated a. away from you and toward others b. toward you and away from others c. away from you and others 5. When working with chemicals and burners, always wear a. safety goggles b. laboratory apron or coat c. both a and b

6. To test the odor of fumes, a. inhale the fumes directly from the container b. gently wave the fumes toward your nose c. take a deep breath and inhale 7. When using scalpels or razor blades, cut the material a. away from you b. on a right angle c. toward you 8. To dispose of all chemicals, a. follow the instructions of your teacher b. throw them in the trash c. burn them in a burner

10. After cutting glass tubing, always fire polish the ends 9. You should know the location of safety equipment in the laboratory and a. use it once a week b. use it twice a year c. how to use it properly 10. After cutting glass tubing, always fire polish the ends a. for easier insertion into stoppers b. to remove sharp edges c. and place in cold water

__ 12. When diluting an acid, add acid to the water. Write T If the statement is true and F if the statement is false. __ 11. Never perform activities that are not authorized by your teacher. __ 12. When diluting an acid, add acid to the water. __ 13. You may heat liquids in a closed container. __ 14. When you have finished an experiment, leave all of the equipment in your work area clean and well organized. __ I5. Always use a clamp or tongs when handling hot containers.

__ 16. If you spill any material, quickly clean it up. __ 17. Rinse any acid off your skin or clothing with water. __ 18. In an experiment, use more chemicals than you need. __ 19. Always keep the lids of all chemical containers open. __ 20. When measuring amounts of liquid using a pipet, mouth suction is the best method.